The FreeRTOS kernel is an MIT licensed AWS open source project.

Quality RTOS & Embedded Software About   Contact   Support   FAQ   Download Menu      Quick Start Supported MCUs PDF Books Trace Tools Ecosystem Quick Start Guide Support Forum ⇓ Download Source ⇓ FreeRTOS+ Ecosystem  FreeRTOS+TCP:  Thread safe TCP/IP stack  SafeRTOS:  TUV certified RTOS  OpenRTOS:  Commercial Licensed RTOS  Fail Safe File System:  Ensures data integrity  FreeRTOS BSPs:  3rd party driver packages  Trace & Visualisation:  Tracealyzer for FreeRTOS  CLI:  Command line interface  WolfSSL SSL / TLS:  Networking security protocols  RTOS Training:  Delivered online or on-site  IO:  read(), write(), ioctl() interface FreeRTOS+ Lab Projects  FreeRTOS+POSIX:  POSIX threading API  FreeRTOS+FAT:  Thread aware file system Hint: Use the tree menu to navigate groups of related pages   uxSemaphoreGetCount [Semaphores] semphr. h UBaseType_t uxSemaphoreGetCount( SemaphoreHandle_t xSemaphore ); Returns the count of a semaphore. Parameters: xSemaphore   The handle of the semaphore being queried. Returns: If the semaphore is a counting semaphore then the semaphores current count value is returned. If the semaphore is a binary semaphore then 1 is returned if the semaphore is available, and 0 is returned if the semaphore is not available. [ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ Sitemap ]    [ ] Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News Meet Richard Barry and learn what's new in the FreeRTOS project at Embedded World 2019 NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS. Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed. View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS. Careers FreeRTOS and other embedded software careers at AWS. FreeRTOS Partners